Grapevine named ‘IFG Twenty-four’

ABSTRACT

This invention is a new and distinct grapevine variety denominated ‘IFG Twenty-four’. The new grapevine is characterized by producing naturally large seedless light red berries having a narrow ovate shape. Fruits are fairly low in acidity, with very dense firm texture and ripen late in the season.

Latin name of the genus and species claimed: Vitis interspecific hybrid.

Variety denomination: ‘IFG Twenty-four’.

BACKGROUND OF THE INVENTION

The new and distinct grapevine described and claimed herein originatedfrom a hand pollinated cross of the 02108-080-157, an unnamedinterspecific seedling selection from the IFG breeding program, and01032-R Bulk hybridized in May 2007. The abortive seed traces weresubsequently embryo cultured and the resulting population of twelveplants was planted in the field in April 2008. The present variety ofgrapevine was selected as a single plant in September 2009 and was firstasexually propagated by hardwood cuttings in December 2009 near Delano,Kern County, Calif. The resulting propagules were planted during April2010 near Delano, Kern County, Calif. and were found to reproducetrue-to-type through at least two generations of asexual reproduction.

BRIEF SUMMARY OF THE INVENTION

The new grapevine ‘IFG Twenty-four’ is characterized by producingnaturally large seedless light red berries having a narrow ovate shape.Fruits normally ripen late season about mid to late September nearDelano Calif. Fruits are fairly low in acidity, with very dense firmtexture, having no noticeable seed traces. Fruits are moderatelysusceptible to sunburn damage and may be difficult to color in hotclimatic conditions. Attachment of the berry to the pedicel is somewhatweak. Vines are productive and can be pruned to short spurs. Canesproduce very little lateral branching allowing sunlight to penetrate thecanopy without laborious shoot removal.

The new grapevine differs from its female parent the 02108-080-157 byhaving larger, lighter red, firmer berries. The exact pollen parent of‘IFG Twenty-four’ is unknown because a composite of several similar redskinned selections from the 01032 progeny were bulked together and usedto pollinate the 02108-080-157. The ‘IFG Twenty-four’ can bedistinguished from any of the selections in the bulked pollen by havinga narrow ovate shape rather than a round or elongated oval shape of the01032 selections composing the bulked pollen and by having a largerberry size, smaller abortive seed traces and fewer large lateral shoots.

The new grapevine variety ‘IFG Twenty-four’ is being introduced becauseof its firm texture, seedlessness, and naturally large berry size.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying photographic drawing illustrates in full color ‘IFGTwenty-four’. The photograph was taken outdoors with indirect lighting.The colors are as nearly true as is reasonably possible in a colorrepresentation of this type. The right side of the drawing has a shoottip. A mature fruit cluster is represented in the center of the drawingalong with a typical berry in cross section. A mature leaf can be seenon the left side of the drawing.

DETAILED BOTANICAL DESCRIPTION OF THE INVENTION

Throughout this specification, color names beginning with a small lettersignify that the name of that color, as used in common speech, is aptlydescriptive. Color names beginning with a capital letter designatevalues based upon R.H.S. Colour Chart, published in 2001 by The RoyalHorticultural Society, London, England.

Throughout this specification subjective description values conform tothose set forth by the International Plant Genetic Resources Institutepublication ‘Descriptors for Grape’ (vitis spp.) (1983) which wasdeveloped in collaboration with the Office International de la Vigne etdu Vin (OIV) and the International Union for the Protection of NewVarieties of Plants (UPOV).

The descriptive matter which follows pertains to ‘IFG Twenty-four’plants grown in the vicinity of Delano, Kern County, Calif. during 2013and 2014, and is believed to apply to plants of the variety grown undersimilar conditions of soil and climate elsewhere:

VINE

-   General:    -   -   Vigor.—Vigorous.        -   Density of foliage.—Dense.        -   Productivity.—Productive, producing about 23 to 32 kg of            marketable fruit per vine.        -   Root stock.—Own root.        -   Training method.—Typically spur pruned leaving 2 bud spurs.-   Trunk:    -   -   Trunk diameter of 4-year-old vines at 30 cm above the soil            line.—About 4.8 cm.        -   Shape.—Medium to slightly stocky.        -   Straps.—Long-split.        -   Surface texture.—Medium rough texture.        -   Inner bark color.—Greyed-orange: 165A.

SHOOTS

-   Young shoot:    -   -   Form of tip.—Wide open.        -   Distribution of anthocyanin coloration on tip.—Piping            (striped).        -   Intensity of anthocyanin coloration on tip.—Weak.        -   Density of prostrate hairs on tip.—Very sparse.        -   Density of erect hairs on tip.—Absent.        -   Color.—Yellow-green: 144A.-   Woody shoot (mature canes):    -   -   Internode length.—Medium-long: About 16.8 cm.        -   Width at node.—About 1.2 cm.        -   Cross section.—Circular.        -   Surface.—Slightly striate.        -   Main color.—The following colors were observed:            Greyed-orange: 166A and 166B and 166C.        -   Density of erect hairs on nodes.—None.        -   Density of erect hairs on internodes.—None or very sparse.        -   Axillary shoot length at full bloom.—Weak to medium,            approximately 11.9 cm.-   Flowering shoot:    -   -   Vigor during flowering.—Medium-strong, producing few lateral            shoots.        -   Attitude during flowering on shoots not tied.—Semi-erect.        -   Color.—Dorsal side of internodes — Yellow-green: 146C, with            Red-purple stripes: 59B.        -   Color.—Ventral side of internodes — Yellow-green: 146C.        -   Color.—Dorsal side of nodes — Yellow-green: 146C, with            Red-purple stripes: 59B.        -   Color.—Ventral side of nodes — Yellow-green: 146C.        -   Density of prostrate hairs on nodes.—None or very sparse.        -   Density of erect hairs on nodes.—None.        -   Density of prostrate hairs on internode.—None.        -   Density of erect hairs on internode.—None.        -   Anthocyanin coloration of buds.—Present.-   Tendrils:    -   -   Distribution on the shoot (at full            flowering).—Discontinuous.        -   Length of tendril.—Long: about 31.4 cm.        -   Thickness of tendril 2 cm from base.—About 1.2 mm.        -   Color.—Yellow-green: N144A.        -   Form.—Trifurcated and quadfurcated.        -   Number of consecutive tendrils.—2.

LEAVES

-   Young leaves:    -   -   Color of upper surface of first four distal unfolded            leaves.—Yellow-green: 146C with Greyed-red spots: 178B.        -   Average intensity of anthocyanin coloration of six distal            leaves prior to flowering.—Weak to medium.        -   Density of prostrate hairs between veins (lower            surface).—Absent.        -   Density of prostrate hairs on veins (lower surface).—Absent            to very sparse.        -   Density of erect hairs between veins (lower            surface).—Absent.        -   Density of erect hairs on veins (lower surface).—Absent.-   Mature leaves:    -   -   Average length.—About 14.7 cm.        -   Average width.—About 16.8 cm.        -   Mature leaf size.—Medium.        -   Shape of blade.—Pentagonal.        -   Number of lobes.—5.        -   Anthocyanin coloration of main veins on upper side of            blade.—Weak.        -   Mature leaf profile.—Flat to slightly undulate.        -   Blistering surface of blade upper surface.—Very weak.        -   Leaf blade tip.—In the plane of the leaf.        -   Undulation of margin.—Slight.        -   Undulation of blade between main and lateral veins.—Absent.        -   Shape of teeth.—Mixture of both sides straight and both            sides convex.        -   Length of teeth.—Short to medium.        -   Ratio length/width of teeth.—Medium.        -   Shape of upper lateral sinuses.—Open to lobes slightly            overlapping.        -   Depth of upper lateral sinuses.—Deep.        -   General shape of petiole sinus.—Slightly open to lobes            slightly overlapping.        -   Shape of base of upper leaf sinuses.—V-shaped.        -   Tooth at petiole sinus.—Absent.        -   Density of prostrate hairs between veins on lower surface of            blade.—Absent to very sparse.        -   Density of erect hairs between veins on lower surface of            blade.—Absent.        -   Density of prostrate hairs on main veins on lower surface of            blade.—Sparse.        -   Density of erect hairs on main veins on lower surface of            blade.—Very sparse.        -   Density of prostrate hairs on main veins on upper surface of            blade.—None or very sparse.        -   Density of erect hairs on main veins on upper surface of            blade.—None.        -   Autumn coloration of leaves.—Leaves can be a single color or            combination of colors, in a mottled pattern or on the edges            of the leaves. The following colors were observed: Yellow:            13A and 13B, and Greyed-yellow: 162A, and Purple; N79A and            N79B and N79C, and Greyed-purple: 187A and 187B and 187C.-   Upper surface:    -   -   Color.—The following colors were observed: Green: 137A and            137B.        -   Anthocyanin coloration of main veins.—Absent to very weak.        -   Surface appearance.—Dull.        -   Blistering surface of blade.—Very weak.-   Lower surface:    -   -   Color.—The following colors were observed: Yellow-green:            146A and 146B.        -   Anthocyanin coloration of main veins (lower surface).—Absent            to weak.        -   Glossiness.—Medium.        -   Surface texture.—Smooth.        -   Surface appearance.—Semi-glossy.-   Petiole:    -   -   Length.—About 6.8 cm.        -   Length of petiole compared to middle vein.—Slightly shorter.        -   Density of prostrate hairs on petiole.—None.        -   Density of erect hairs on petiole.—None.-   Buds:    -   -   Bud fruitfulness.—Basal: mostly fruitful.        -   Position of first fruitful shoot on previous season            cane.—1^(st) to 2^(nd) node.        -   Dormant bud length.—About 5.4 mm.        -   Dormant bud width in the proximal/distal plane.—About 4.6            mm.        -   Dormant bud color.—Greyed-orange: 166A.        -   Time of bud burst.—Midseason: Mar. 7, 2014.

FLOWERS

-   General:    -   -   Flower sex.—Hermaphrodite.        -   Length of first inflorescence.—Medium: about 20.8 cm long by            11.6 cm wide.        -   Position of first flowering and fruiting node.—3rd to 5^(th)            node (current season growth).        -   Number of inflorescence per flowering shoot.—1.1 to 2.        -   Time of bloom.—Midseason as compared with similar varieties            in the growing area of Delano, Calif.        -   Date of full bloom.—About Apr. 25, 2014.

FRUIT

-   General:    -   -   Ripening period.—Late; Approximately Oct. 3, 2014.        -   Use.—Fresh market.        -   Keeping quality.—Moderate, can be prone to berry shatter            during handling and storage at 0° C. and high RH.        -   Resistance to.—Insects: Average typical of Vitis vinifera            species. Diseases: Average typical of Vitis vinifera            species.        -   Refractometer test.—Soluble solids: About 16.0 Brix.        -   Brix/acid.—About 36.4.        -   Titratable acidity.—About 0.44.        -   Juice ph.—About 3.6.-   Cluster:    -   -   Mature cluster length (peduncle excluded).—About 38.4 cm.        -   Mature cluster width.—About 19.9 cm.        -   Mature cluster weight.—About 1320 g.        -   Bunch density.—Loose.        -   Number of berries.—About 199.        -   Form.—Elongated conical.-   Peduncle:    -   -   Lignification of peduncle.—Weak.        -   Length of peduncle.—Medium long, approximately 4.4 cm.-   Berry:    -   -   Uniformity of size.—Uniform.        -   Single berry weight.—About 8.1 g.        -   Shape.—Narrow ovate.        -   Seeds.—Contains small rudimentary seed traces not            noticeable.        -   Cross section.—Circular.        -   Berry dimensions.—Longitudinal axis: about 3.0 cm;            horizontal axis: about 2.1 cm.        -   Berry firmness.—Very firm.        -   Particular flavor.—Neutral.        -   Bloom (cuticular wax).—Medium.        -   Berry separation from pedicel.—Medium to easy.        -   Skin color (without bloom).—Greyed-purple: 187B.-   Skin:    -   -   Thickness.—Medium.        -   Skin toughness.—Somewhat notable when chewing.        -   Reticulation.—Absent.        -   Tenacity.—Tenacious to flesh.

What is claimed:
 1. A new and distinct variety of grapevine as hereinillustrated and described.